Radiation therapy head and neck positioning skull and facial bone eccentric sliding ball fixing rack

The invention provides a radiation therapy head and neck positioning skull and facial bone eccentric sliding ball fixing rack. The radiation therapy head and neck positioning skull and facial bone eccentric sliding ball fixing rack is constituted by a head bottom plate, an upper jaw bone supporting assembly, an occluder sliding ball assembly, a three-leg fornix right support, a three-leg fornix left support, a jaw base tooth front hole, a nasion fixing device, a noise base tooth front hole, a three-leg fornix front support 262, and a cam type locking column. Relative fixing is realized by teeth biting supporting points of a fixing support, and the supporting body of the fixing support is used to press the bone mark of the head to realize the relative fixing of the nasion part, and by adopting cooperation with a special positioning head rack series, limiting fixing of a head and a neck of a human body is realized, and zero displacement is realized or almost realized, and therefore disadvantages and defects of conventional head radiation therapy positioning structures are effectively solved. The radiation therapy head and neck positioning skull and facial bone eccentric sliding ball fixing rack has advantages of reasonable design, convenient and safe operation, obvious fixing effect, strong practicability, and strong versatility.